1 files changed, 110 insertions, 0 deletions
diff --git a/include/linux/leds.h b/include/linux/leds.h
new file mode 100644
index 00000000000..dc23c7c639f
--- /dev/null
+++ b/include/linux/leds.h
@@ -0,0 +1,110 @@
+/*
+ * Driver model for leds and led triggers
+ *
+ * Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu>
+ * Copyright (C) 2005 Richard Purdie <rpurdie@openedhand.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#ifndef __LINUX_LEDS_H_INCLUDED
+#define __LINUX_LEDS_H_INCLUDED
+
+struct device;
+struct class_device;
+/*
+ * LED Core
+ */
+
+enum led_brightness {
+	LED_OFF		= 0,
+	LED_HALF	= 127,
+	LED_FULL	= 255,
+};
+
+struct led_classdev {
+	const char		*name;
+	int			 brightness;
+	int			 flags;
+
+#define LED_SUSPENDED		(1 << 0)
+
+	/* Set LED brightness level */
+	void		(*brightness_set)(struct led_classdev *led_cdev,
+					  enum led_brightness brightness);
+
+	struct class_device	*class_dev;
+	struct list_head	 node;			/* LED Device list */
+	char			*default_trigger;	/* Trigger to use */
+
+#ifdef CONFIG_LEDS_TRIGGERS
+	/* Protects the trigger data below */
+	rwlock_t		 trigger_lock;
+
+	struct led_trigger	*trigger;
+	struct list_head	 trig_list;
+	void			*trigger_data;
+#endif
+};
+
+extern int led_classdev_register(struct device *parent,
+				 struct led_classdev *led_cdev);
+extern void led_classdev_unregister(struct led_classdev *led_cdev);
+extern void led_classdev_suspend(struct led_classdev *led_cdev);
+extern void led_classdev_resume(struct led_classdev *led_cdev);
+
+/*
+ * LED Triggers
+ */
+#ifdef CONFIG_LEDS_TRIGGERS
+
+#define TRIG_NAME_MAX 50
+
+struct led_trigger {
+	/* Trigger Properties */
+	const char	 *name;
+	void		(*activate)(struct led_classdev *led_cdev);
+	void		(*deactivate)(struct led_classdev *led_cdev);
+
+	/* LEDs under control by this trigger (for simple triggers) */
+	rwlock_t	  leddev_list_lock;
+	struct list_head  led_cdevs;
+
+	/* Link to next registered trigger */
+	struct list_head  next_trig;
+};
+
+/* Registration functions for complex triggers */
+extern int led_trigger_register(struct led_trigger *trigger);
+extern void led_trigger_unregister(struct led_trigger *trigger);
+
+/* Registration functions for simple triggers */
+#define DEFINE_LED_TRIGGER(x)		static struct led_trigger *x;
+#define DEFINE_LED_TRIGGER_GLOBAL(x)	struct led_trigger *x;
+extern void led_trigger_register_simple(const char *name,
+				struct led_trigger **trigger);
+extern void led_trigger_unregister_simple(struct led_trigger *trigger);
+extern void led_trigger_event(struct led_trigger *trigger,
+				enum led_brightness event);
+
+#else
+
+/* Triggers aren't active - null macros */
+#define DEFINE_LED_TRIGGER(x)
+#define DEFINE_LED_TRIGGER_GLOBAL(x)
+#define led_trigger_register_simple(x, y) do {} while(0)
+#define led_trigger_unregister_simple(x) do {} while(0)
+#define led_trigger_event(x, y) do {} while(0)
+
+#endif
+
+/* Trigger specific functions */
+#ifdef CONFIG_LEDS_TRIGGER_IDE_DISK
+extern void ledtrig_ide_activity(void);
+#else
+#define ledtrig_ide_activity() do {} while(0)
+#endif
+
+#endif		/* __LINUX_LEDS_H_INCLUDED */